JPH01126638U - - Google Patents
Info
- Publication number
- JPH01126638U JPH01126638U JP1587988U JP1587988U JPH01126638U JP H01126638 U JPH01126638 U JP H01126638U JP 1587988 U JP1587988 U JP 1587988U JP 1587988 U JP1587988 U JP 1587988U JP H01126638 U JPH01126638 U JP H01126638U
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- local
- oscillation
- oscillation circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002184 metal Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 6
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Structure Of Receivers (AREA)
Description
第１図は本考案のチユーナ構造の一実施例を示
す要部斜視図、第２図は従来、一般に使用されて
いるダブルスーパーヘテロダインチユーナの回路
構成を示すブロツク図である。
１０……シールド用金属ケース、１１……プリ
ント基板、１２……共振線路、１３……アジヤス
ター、１４……金属プレート、１５，１６，１７
，１８……切欠部。
FIG. 1 is a perspective view of essential parts showing an embodiment of the tuner structure of the present invention, and FIG. 2 is a block diagram showing the circuit configuration of a conventional double superheterodyne tuner that is commonly used. 10... Metal case for shielding, 11... Printed circuit board, 12... Resonance line, 13... Adjuster star, 14... Metal plate, 15, 16, 17
, 18... Notch.
Claims (1)
らの発振出力を混合して第１の中間周波信号（以
下、第１のＩＦ信号と云う）を作成して出力する
第１の混合器と、前記第１のＩＦ信号に対して第
２の局部発振回路（以下、第２局発と云う）から
の発振出力を混合して第２の中間周波信号を作成
して出力する第２の混合器よりなるダブルスーパ
ーヘテロダインチユーナに於いて、前記チユーナ
のシールドケースに、第２局発の発振周波数を調
整する金属プレートを前記第２局発を構成する共
振周波数を調整する金属プレートを前記第２局発
を構成する共振線路の近傍で、保持する切欠部を
複数個設けたことを特徴とするチユーナ構造。 a first mixer that mixes an oscillation output from a first local oscillation circuit with a high frequency input signal to create and output a first intermediate frequency signal (hereinafter referred to as a first IF signal); a second mixer that mixes the first IF signal with an oscillation output from a second local oscillation circuit (hereinafter referred to as second local oscillation circuit) to create and output a second intermediate frequency signal; In a double superheterodyne tuner comprising: a metal plate for adjusting the oscillation frequency of the second local oscillator; A tuner structure characterized by having a plurality of holding notches near a resonant line that constitutes a local oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1587988U JPH01126638U (en) | 1988-02-09 | 1988-02-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1587988U JPH01126638U (en) | 1988-02-09 | 1988-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01126638U true JPH01126638U (en) | 1989-08-30 |
Family
ID=31228322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1587988U Pending JPH01126638U (en) | 1988-02-09 | 1988-02-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01126638U (en) |
-
1988
- 1988-02-09 JP JP1587988U patent/JPH01126638U/ja active Pending
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